Gael winkleb



r C. WINKLE.R.- CYLINDER FLAT FORM PRINTING MACHINE.

APPLICATION FILED NOV. 6, 1915.

1,322,472. Patented Nov. 18, 1919;

2 SHEETS-SHEET I.

arm

A framv v s C. WINKLER.

CYLINDER FLAT FORM PRINTING MACHINE.

APPLICATION FILED NOV. 6, 19I5- Patented Nov. 18, 1919.

2 SHEETS-SHEET 2.

, For this CARL WINKLER, or BE'RN'E, SWITZERLAND.

CYLINDER FLAT-FORM 'PRINTIN G-MACHIN E.

Application filed November 6, 1915. Serial No.

To all whom it may concern:

Be it known that I, CARL WINKLER, a citizen of the Swiss Republic, residing at Berne, in the Swiss Republic, have invented new and useful Improvements in Gylmder Flat-Form Printing-Machines, of which the following is a specification.

The invention relates to improvements 1n printing machines of the kind in which a cylinder oscillating backward and forward or rotating continuously or intermlttently in one direction carries the sheet to be printed over a slide carrying the form. By the improvements the transfer of the sheets to, and their delivery from, said cylinder is rendered quieter and more reliable by pneumatic means than is possible in the constructions of such machines heretofore known. Further objects of the invention will be explained below in connection with two constructions chosen as examples.

On the drawing Figure 1 shows the side elevation of a printing machine in which the sheets are taken from the feed table by suction. V

Fig. 2 is a plan of the machine shown in Fig. 1 representing the arrangement of the driving motor and pump.

Fig. 3 is a side elevation of a modified form of printing machine in which at least one filter is provided in the suction and force pipe.

Fig. 1 is a plan of the machine shown in Fig. 3.

Fig. 5 is a detail sectional view on an enlarged scale of the valve.

a (Fig. 1) is the paper carrying cylinder, which, as mentioned above, either oscillates backward and forward or turns continuously or intermittently in one direction. This cylinder, in the example chosen, takes the sheet to be printed from the feed table 6 and leads same over the carriage c which moves backward and forward underneath the printing cylinder at. In a machine of this kind the cylinder a, according to my invention, takes the sheet from the feed table I) by suction. purpose the hollow shaft (Z of the cylinder (4 is connected with the air pump e by a pipe f, in which a three-way-cock g is provided, see Fig. 5. This cock 9 is so opened and closed by the driving shaft h by means of the link gearing i that the pipe 7 is alternately connected with the suction pump 6 and the atmosphere. In order to take a sheet from the feed table 5 the pipe f Specification of Letters Patent.

is brought into connection with the pump 6 at the moment in which the outer end of the suction bar 70 connected with the hollow shaft d passes the feed table Z), so that the edge of the sheet is caught, the sheet taken from the table and wrapped around the cylinder (1. For the purpose of delivering the printed sheet to the conveying out device the pipe 7 is connected with the atmosphere, so that the suction bar is releases said sheet.

The air pump 6 is preferably driven by the motor driving the machine, and said pump should be arranged inside the frame of the machine, in order to save space.

It is of advantage, in using air for feeding and delivering the sheets to and from the machine respectively, to provide at least one filter in the suction or force pipe, as shown in Figs. 3 and 4. By such filters the entrance of dirt and oil is avoided, so that the sheets are not soiled.

In the example illustrated the air pump 6 which is driven direct by the motor Z is connected by a pipe m with the receiver or pressure chamber a, preferably arranged in the machine frame 0. This receiver communicates through the pipe 39 with the point of operation of the air, and it contains the filter r. The suction pipe .9 is connected with a vacuum chamber 2 and also containsafilter a. This vacuum chamber 2 communicates with the point of use by a pipe w.

What I claim and desire to secure by Letters Patent of the United States is 1. In a printing machine, the combination of a frame having an air receiving and suction chamber formed therein, a paper feeding cylinder having axial and radial passages, a connection between the axial passage of the cylinder and the suction chamber, air suction means connected with the air receiver, an inlet pipe connected with the air receiver, a filter in said pipe, a pipe connecting the vacuum chamber with the air suction means, and a filter in the pipe connecting the vacuum chamber with the air suction means.

2. In a cylinder flat form printing machine, a frame, an air-tight chamber the walls of which are formed by said frame, a paper carrying cylinder having a hollow shaft and a radial passage leading from the shaft, a valve controlled connection between the chamber and said shaft, and an air pump connected with said chamber.

3. In a cylinder fiat form printing ma- Patented Nov. 18, 1919.

chine, a cast frame having air-tight chambers, formed ln tegrally 1n the members thereof, a paper carrylng cyhnder havlng axml and radlal zur passages, an alr pump connected W1th the SELld chambers, and. a connectlon between one of the $216. chambers and the 2x121 passage of the cylinder.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

V CARL WINKLER. Witnesses:

P. RURBRAOH,

' M. BERTSCHINGER. 

